Let me summarise two pages:
We don't know which IP address he is using to connect to the router by cable or wireless
We don't know whether the router has been reset to factory and default used.
We don't know details of the router.
In my opinion, laptop reset etc is a waste of time at the moment, as is ipconfig /all
Still, it is raining here and I cannot get out to the Amberley Gardens Festival.